Several things can indicate a problem: 1  Yellow or leaning flame (your flame should be blue) 2  Signs of corrosion, visible cracks or other instances of exterior wear and tear. 3  A smell like formaldehyde. 4  The presence of soot.
NSSF Rimfire Challenge. The NSSF Rimfire Challenge is a .22 rifle and pistol program created to introduce new people to the shooting sports and provide a pathway to shooting competition. The NSSF Rimfire Challenge can provide individuals or families with a fun and exciting first-time shooting experience. Shooting ranges can utilize the concept as a Second Round component to NSSF's First Shots program.
Any safe rimfire rifle with any type of action may be used. Rifles must be chambered for the .22 long rifle rimfire cartridges. Magnum rimfire or .17 caliber rimfire rifles may not be used. Shooters in Rimfire Sporter Matches may use any .22 LR ammunition they wish.